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Micron-thick highly conductive PEDOT films synthesized via self-inhibited polymerization: roles of anions
Shi, Wei1; Yao, Qin; Qu, Sanyin; Chen, Hongyi1; Zhang, Tiansong; Chen, Lidong2
2017
Source PublicationNPG ASIA MATERIALS
ISSN1884-4049
Volume9
AbstractThe inhibitor-dependent poly(3,4-ethylenedioxythiophene) (PEDOT) fabrication suffers major problems in the areas of controllability and film thickness. In this work, we found that anions play a key role in both the polymerization and the structure of PEDOT. As a precursor, anions greatly influence the reaction rate and oxidant solubility. In its role as a counter-ion, the anions also affect chain conductance and crystal growth. With these behaviors in mind, a self-inhibited polymerization approach using novel oxidants with appropriate anions was successfully developed to facilitate the fabrication of high quality in situ polymerized PEDOT films and solve the thickness limitation problem. Inhibitor-free heavy oxidative solutions with weakly basic anions enable the spin-coating of thick and homogeneous oxidant layers and also effectively inhibit both the crystallization of the oxidant and H+ formation throughout the polymerization process. PEDOT: dodecylbenzenesulfonate (PEDOT:DBSA) exhibits the highest performance among all candidates due to its appropriate anion basicity and low steric effect. An extremely high doping level of 42.9% is achieved, and an electrical conductivity of similar to 1100 S cm(-1) is successfully maintained for film thicknesses between 310 nm and 1.79 mu m. In addition, the thermoelectric power factor (RT) for pristine films was improved to 77.2 mu W mK(-2) from 69.6 mu W mK(-2) by the dedoping treatment. This study provides a new approach for fabricating high performance PEDOT thick films using anion-based design.
DOI10.1038/am.2017.107
WOS IDWOS:000406063200001
EI Accession Number1884-4057
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/26662
Collection中国科学院上海硅酸盐研究所
Affiliation1.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, 1295 Dingxi Rd, Shanghai 200050, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Shanghai Inst Ceram, CAS Key Lab Mat Energy Convers, 1295 Dingxi Rd, Shanghai 200050, Peoples R China
Recommended Citation
GB/T 7714
Shi, Wei,Yao, Qin,Qu, Sanyin,et al. Micron-thick highly conductive PEDOT films synthesized via self-inhibited polymerization: roles of anions[J]. NPG ASIA MATERIALS,2017,9.
APA Shi, Wei,Yao, Qin,Qu, Sanyin,Chen, Hongyi,Zhang, Tiansong,&Chen, Lidong.(2017).Micron-thick highly conductive PEDOT films synthesized via self-inhibited polymerization: roles of anions.NPG ASIA MATERIALS,9.
MLA Shi, Wei,et al."Micron-thick highly conductive PEDOT films synthesized via self-inhibited polymerization: roles of anions".NPG ASIA MATERIALS 9(2017).
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